Question

hydrogen may be liquefied at -235 degree celsius under a pressure of 20 atm. the temperature on the degree Fahrenheit scale is...

Answer 1

We can convert celsius to Fahrenheit using the following formula:

$$T_{^{\circ}F}=T_{^{\circ}C}\cdot \dfrac{9}{5}+32,$$ $$T_{^{\circ}F}=-235^{\circ}C\cdot \dfrac{9}{5}+32=-391^{\circ}F.$$